Lighting device



FIG. 1 is a front perspective view of an embodiment of a lighting device showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a right side view thereof; and,

FIG. 9 is an enlarged partial view of a portion of the front perspective view of FIG. 1.

The broken lines shown in the FIGS. 1, 2, 3, 5 and 9 represent portions of the design that form no part of the claim. 

CLAIM The ornamental design for a lighting device, as shown and described. 